Hi Will, I don't have any experience with the amps you've listed but I do have a Yarland FV-34c that probably retailed for less than US$400. I use it as an office system with a pair of kef q1 bookshelf speakers (91dB) and it sounds great. I've also tried it with my ProAc D38's as an experiment, pretty extreme ends of the price scale but they're also 91dB efficiency and can be driven by as little as 10w but the little yarland just doesn't have a grunty enough power supply to drive them.
I'd imagine you might find the same with the amps you're looking at. Pair them with some easy to drive bookshelf speakers and a sub and they'll be fine, but they will likely struggle to drive floor standers without sounding thin and harsh.
Hope that helps.
I'd imagine you might find the same with the amps you're looking at. Pair them with some easy to drive bookshelf speakers and a sub and they'll be fine, but they will likely struggle to drive floor standers without sounding thin and harsh.
Hope that helps.